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[SCTP]: Implement SCTP_MAX_BURST socket option.

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Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2007-03-23 11:34:36 -07:00
committed by David S. Miller
parent a5a35e7675
commit 703315712c
6 changed files with 67 additions and 3 deletions
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61
net/sctp/socket.c
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@ -2892,6 +2892,36 @@ static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
return 0; /* is this the right error code? */
}
/*
* 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
*
* This option will allow a user to change the maximum burst of packets
* that can be emitted by this association. Note that the default value
* is 4, and some implementations may restrict this setting so that it
* can only be lowered.
*
* NOTE: This text doesn't seem right. Do this on a socket basis with
* future associations inheriting the socket value.
*/
static int sctp_setsockopt_maxburst(struct sock *sk,
char __user *optval,
int optlen)
{
int val;
if (optlen != sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
if (val < 0)
return -EINVAL;
sctp_sk(sk)->max_burst = val;
return 0;
}
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@ -3012,6 +3042,9 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_FRAGMENT_INTERLEAVE:
retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
break;
case SCTP_MAX_BURST:
retval = sctp_setsockopt_maxburst(sk, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
@ -3171,6 +3204,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
sp->default_timetolive = 0;
sp->default_rcv_context = 0;
sp->max_burst = sctp_max_burst;
/* Initialize default setup parameters. These parameters
* can be modified with the SCTP_INITMSG socket option or
@ -4689,6 +4723,30 @@ static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
return -ENOTSUPP;
}
/*
* 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
* (chapter and verse is quoted at sctp_setsockopt_maxburst())
*/
static int sctp_getsockopt_maxburst(struct sock *sk, int len,
char __user *optval,
int __user *optlen)
{
int val;
if (len < sizeof(int))
return -EINVAL;
len = sizeof(int);
val = sctp_sk(sk)->max_burst;
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, &val, len))
return -EFAULT;
return -ENOTSUPP;
}
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@ -4809,6 +4867,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
optlen);
break;
case SCTP_MAX_BURST:
retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;